Index: trunk/psphot/src/psphotModelBackground.c
===================================================================
--- trunk/psphot/src/psphotModelBackground.c	(revision 26894)
+++ trunk/psphot/src/psphotModelBackground.c	(revision 27657)
@@ -371,6 +371,6 @@
 
     psImageBinning *binning = psphotBackgroundBinning(readout->image, config); // Image binning parameters
-    pmReadout *model = pmFPAGenerateReadout(config, view, "PSPHOT.BACKMDL", inFPA, binning);
-    pmReadout *modelStdev = pmFPAGenerateReadout(config, view, "PSPHOT.BACKMDL.STDEV", inFPA, binning);
+    pmReadout *model = pmFPAGenerateReadout(config, view, "PSPHOT.BACKMDL", inFPA, binning, index);
+    pmReadout *modelStdev = pmFPAGenerateReadout(config, view, "PSPHOT.BACKMDL.STDEV", inFPA, binning, index);
 
     if (!psphotModelBackgroundReadout(model->image, modelStdev->image, model->analysis, readout, binning, config)) {